Water resource planers and managers must understand the water bady distribution such as ponls

pools

lakes and reservoirs within the research area for making more effective use of water resources. Remote sensing technigues of satellite has provided us new data contahing above information. But

due to limitation of pixel resolution characteristics of Landsat

those smaller water bodies distributed widely over our country can’t be effectively extracted.In view of the situation

this paper concretely analyses and discusses principle and results of two water body interpretation methods by single near-infrared and Landsat chromaticity coordinates techniques

based on Landsat CCT data.At last

a "proportion Estimation" method is introduced. It not only distinguishes smaller water bodies

but improves area accuracy of interpretation compared with the results at the same experimental watershed.